Incandescent gas-lamp.



D. P. JOHNSON. INGANDESGENT GAS LAMP. APPLICATION FILED-D3011, 1907.

910,202. Patented Jan. 19, 1909.

Bil"

WITNESSES: INVENTOR 2 SHEETS-SHEET l.

D. F. JOHNSON.

. INGANDBSGENT GAS LAMP.

APPLICATION FILED DEO.11.1907.

Patented Jan. 19, 1909.

2 SHEETS-SHEET 2.

Vv v o o v% u F1 E-E INVENTOR DZ TR. WIN JO f/yJO/Y.

BY 4 ATTIORNEY my W UNITED STATES AT NT OFFICE.

DARWIN F. JOHNSON, OF OEDAR FALLS IOWA.

moannnsonnr GAS-LAMP.

Specification of Letters Patent.

rateiltearan. is, 1909.

Application filed December 11, 1907. Serial No. 406,031.

To all whom it may concern:

Be it known that I, DARWIN F. JOHNSON, a citizen of the United States of America, and a resident of Cedar Falls, Blackhawk county, Iowa, have invented certain new and useful Improvements in Incandescent Gas- Lamps, of which the following is aspecification. e

My invention relates to improvements in incandescent gaslamps, and the object of my improvement is to provide suitable means for heating the gas before it is mixed with air or arrives at the burner, utilizing the current of heated air which moves upward from about the burner.

Another object is to adapt the channel or.

passage. which contains the mixed gas and air ere it arrives at the burner,'so that it will impart a spirally whirling motion to the current with a view to thereby fill all parts of the interspace of the mantle equally and also prevent back-firing.

Another object is to furnish for an inverted burner improved detachable means of its needle valve. Fig. 3 is an under plan view of the lamp, and of the means for detachably suspending the mantles thereon.

Similar numbers refer to similar parts throughout the several views. The component parts of my improved lamp are contained within an outer casing formed of the three, cylindrical parts 31, 32 and 39, such parts being fitted respectively together 95 shown, and the. up .er cylinder 39 beingcovered by a convexp ate 41, centrally and axially orificed-for the reception of the gas inlet ipe 42. The lower end of h the lower cylin er 31 is curved outward,

and to this flange portion is secured the outer edge of the reentrant frustal part 14 attached to an inner cylinder 38, the latter being c'oncentric'with the outer casing, but

extending upward within it not quite to the convex cover 41, and having an open upper end. The lower edge part 18 or the outwardly flanged cylinder 31, is bent inwardas shown, and provided with a plurality of orifices 19, to permit air to flow therethrough 'into the globe 28.

The numeral -16 designated a ring concaved outwardly and adapted to receive the concaved upper portion of the glass globe 28, the globe being retained removably therein by.means of the screws 17. A hinge 15 serves to connect thefring 16 to the flanged part of the casing cylinder 31, while the opposite part. of such ring has a resilient snapcatch 27 adapted to hook over said flange to detachably secure the ring thereto.

lrVithin the upper part of the cylinder 33 is contained a part-34 of the castings containing the main gas passage and valve 36.

The upper part of the part 34 has a screw- -thread connection with the lower end of the gas inlet pipe 42, while the lower part of said casting has a screw-thread connection with a'coupling 3. A U-shaped casting 35 is located between the outer casing and said cylinder 33, its limbs passing through openings in the cylinder and coupled to the casting 34 so to provide a U-shaped channel thereth'rough in communication with the inlet pipe 42 and a depending tube 1 whose upper end. is secured within the contracted upper end of the coupling 3. The tube 1 is contained within and concentric and spaced apart from the outer tube 2, the latter being secured at its upper end to the expande lower end of the coupling 3. The lower open end of the inner tube 1 is also spaced away from the screw-ca 9 by which the lower'end ofthe outer tu e 2 is closed.-

A valve 36, havin a main-pass 37 and a byass 38, is locate in the U-shaped part of t e gas passage,and adapted'to be rocked by reason of depending chains 48 connected to the lever-arms 47 on the valve-spindle 46. An auxiliary burner tube 8 is inv communication with the by-pass 38 when said valve is closed, to furnish lighting means for theburners 11.

A plurality of inverted mantles 26 are suspended on rings 29 whose flanges are adapted to be supplorted on the rings 25, when the mantles ave been thrust down through the openings of the latter. As shown in Fig.3, the rim s 25 are attached tothe ends of the brac ets 55, the inner ends of the latter being fixedly secured to the annulus 24 which is made slidable over the depending tube 44, the upper end of the latter having a screw-thread connection with the bottom of the screw-ca 9. A horizontal rod 50 extends from sai annulus 24 radially, and its outer end has a pivotal connection 22 with the outer end of another horizontal rod 49 whose inner end is fixedly secured to another annulus 20 slidably mounted on said tube 44 between the annulus 24 and the screw-cap 9. The annulus 20 is detachably fastened to the tube 44 by means of a set-screw 23. The mantles 25 are thus suspended with their bracketed hangers 55 and the annulus 24 from the annulus 20, and the two annuli may be lowered over the tube 44, after the setscrew 23 hasbeen loosened, to permit the annulus 24 to drop below the end of said tube far enough to allow of the rod 50 and the brackets 55 bein swung around as indicated by the dotted lines in Fig. 3, that the mantles 26 may be re laced, or removed. When the annulus has een restored to its former position upon the tube 44, and the set-screw 23 fastened to the tube, the said annulus is retained against lateral displacement by means of the small curved lever 53 pivoted on a stud 52 on said annulus, and whose inner end is impelled to partially close the lateral slot in the annulus by means of a spring 54 bearing against its outer end. I I

The annulus 24 may be complete in, use

and its curved coacting lever 53 dispensed with if desired, but if from any cause the lamp is vibrated or jarred, the mantles are less liable to be injured, if the annulus is held tightly against its support, which is efiected by reason ofthe resilient spring 54 holding the lever 53 and the annulus 24 in close contact with the tube 44.

The numeral 4 designates radial tubes in communication with the interior of the thimble 3, and the outer ends of said tubes are ex anded into spherical chambers. 5,

. each 0 the latter having a valve-seat 56 for .the reception of the conical valve point 57' on the end of the rotatable spindle 13, the upper end of the latter having a thread to 'work in an interiorly'threaded seat in the upper part of said chamber and turned by means of a hand-wheel 59. By the means of this valve the proportionate amounts of gas and air may be regulated before the mixture arrives at the burner. The chamber 5 discharges into a depending tube 7 in each case, the latter having orifices 6 that air may pass thereinto from the orifices 30 in the outer casing cylinder 32,-to mix with the gas from sald chamber.

The numeral 10 designates a tube'formed -preferably of an exteriorly enameled, or

vitreous composition, and whose upper eno',

'desce'nce thereof, previously-warmed mlxed gas .and air'does has a screw-threaded connection with the lower end of the tube 7. The vitreous composition of the tube 10 prevents its heating up as much as a. metal tube, being a non-con- -ductor of heat, and is less liable to coat up exteriorly with lamp-black. For the same reasons it is also considered desirable to construct the hood -14 of a vitreous material or of an exteriorly enameled plate. The lower end of the tube 10 is contracted to form a burner 58 which delivers themixed air and gas into the'inverted mantles 26.

Referring to Fig. 2, it will be seen that the tube 10 contains an interior tube 11, the latter being pierced with a plurality of U-shaped cuts to provide a desired number of tongue-shaped pieces 12 depending obliquely downward and bent slightly inwardly to form oblique spiral rows, with spirally arranged channels meandering between them. The interposition of these spirally arranged rows of inwardly directed tongues 12 in the current of mixed gas in the interior of said tube, has the effect of imparting a vortical or spiral motion and direction to the gas, which is so delivered through the burner 58 into the mantle 26, that the whole mantle is instantly filled throughout, and the whole mantle rendered incandescent when the gas is ignited from the adjacent auxiliary tip on the bypass tube '8. The vortical movement thus imparted to the gas causes it to so fill the tube 10 and burner that any danger of back-firing is obviated.

I have shown in my said improved lamp, a method of heating the gas before it is mixed with the airin the tubes 7. Cold air which enters the glob'e 28 through the orifices 19 in the ring 18, moves about the incandescent mantles 26, where its oxygen is highly heated and partially consumed and the heated gaseous product of combustion then passes upward in an ascending current .as indicated by the arrows between; the cylinder 33 and'the tube 2, thence out of the open'upper endof said cylinder to find exit from the outer casing by way ofthe orifices 40. In all cases, whether a glob ei28 is used or not, the above describednc'tiontakes place, since a supply of air" outside the mantles is required to make combustion of the mixed gas and air within the mantles possible. The mantles are not cooledoil by this passage of air over them for such passage is a'necessary incident of the incanwhile the introduction of positively add to the lighting value of the lamp through the increased elevation oi the temperature of such mantles. he resulting economy and enhanced efiiciency in'use of the lamp is. obvious, since no heat is drawn from the mantles to raise the mixed gas to the igniting point, which saves a percentage 130 'burner tube. a

of gas that would otherwise be spent in useless combustion. The gas, by means of the peculiar arrangement of the inner and outer tubes 1 and 2, is thus caused to move twice through the heated space, delaying its passage enough to cause it to be sufiiciently warmed. I

Having described my invention, what I claim as new,.and desire to secure by Letters Patent, is

1. In a gas lamp, in combination, a gas burner having an air and gas mixing chamber, a gaschamber in communication with said mixing chamber and with a source of gas supply, said gas chamber being formed to cause the gas to circulate back and forth therein before entering said mixing chamber, the valve is closed and in communication between said gas chamber and saids'ource of gas supply, an auxiliary burner tube, a bypass in said valve adapted to be open when the valve is closedand in communication with said auxiliary burner tube, a partition separating said gas and mixing chambers, said gas chamber only being located so as to be heated by warm air currents from said burner.

2. In a gas lamp, in combination, a source of gas supply, a gas burner supplied with an air and gas mixing chamber, an open-ended tube in communication with said source of gas supply, an outer closed tube about and spaced away from the said first-mentioned tube, means of communication between said outer tube and the mixing chamber, and a partition between said gas and mixing chamber for causing air heated by said burner to circulate about said outer tube only to heat the gas contained in said tubes before arriving at the mixing chamber.

3. In a gas lamp, 1n combination, a source of gas supply, a gas burner supplied wlth an air and gas mixing chamber, an open-ended tube in communication with said source of gas supply, a valve adapted to close the communication between said tube and said source of gas supply, an outer closed tube about and spaced away from the said first-mentioned tube, means of communication including a regulating valve between said outer tube and said mixing-chamber, and means for causing air heated by said burner to move about said outer tube to heat the gas contained in said tubes before arriving at the mixing chamber.

4. In an incandescent gas lamp, in combination, a mantle adapted to become incandescent when gas is ignited therein, a source of gas supply, a supply tube in communication with said source of supply, a burner tube delivering into said mantle, a mixing chamber between and in communication with both said supply tube and said plurality of inwardly projecting obliquely rowed tongues spaced from said mantle to cause them to move about said tube,

5. In an incandescent gas lamp, in combination, a mantle adapted to become incandescent when gas is ignited therein, a source of gas supply, an open-ended tube in communication with said source of gas supply, an Outer closed tube about and spaced away from the inner open tube, a burner tube adapted to deliver into said mantle, a mixing chamber in communication with both said burner tube and said outer tube, an inclosing partition separating said outer tube from the said mixing chamber exteriorly, said outer tube, mixing chamber and partition being so located respectively to said mantle that heat currents in the air passing from about the mantle will heat the said outer tube, but be cut off from said mixing chamber by said partition.

6. In an incandescent gas lamp, in combination, a hanger depending therefrom, a bracket detachably and slidably connected to said hanger, a second bracket detachably and slidably connected to said hanger, a pivotal connection between the ends of said brackets, bracketed arms extending from the second bracket, horizontal rings on the ends of said bracketed arms, and mantles removably supported by said rings.

7. In an incandescent gas lamp, in combination, amantle adapted to become incandescent when gas is ignited therein, a source of gas supply, a gas reservoir in communication with said source of gas supply, a mixing chamber having air-inlets and means of communication with said gas-reservoir, a parti- 'chamber, a burner-tube leading from said mixing-chamber to said mantle, a tube fitted to the inside of said burner-tube, the said inner tube having a number of angular incisions all over it spirally arranged with the t0ngue-shaped pieces within the incisions bent obliquely toward the tubes axis and having their tips directed toward said mantle, said tongue-shaped pieces cooperating with the burner-tube and mantle to prevent back-firing in said tube.

Signed at Cedar Falls, Iowa, this 7th day of Dec. 1907.

DARWIN F. JOHNSON.

Witnesses:

W. H. Bnnrono, EMIL RASMUSSEN. 

